<template>
  <el-upload
    class="avatar-uploader"
    action=""
    :show-file-list="false"
    :before-upload="beforeAvatarUpload"
    :http-request="uploadImg"
  >
    <img v-if="value" :src="value" class="avatar">
    <i v-else class="el-icon-plus avatar-uploader-icon" />
    <div slot="tip" class="el-upload__tip">支持扩展名:jpg、png文件不得大于100kb</div>
  </el-upload>

</template>
<script>

import { uploadImg } from '@/api/guanli'
export default {
  name: '',
  props: {
    value: {
      type: String,
      default: null
    }
  },
  methods: {
    beforeAvatarUpload(file) {
      const isJPG = ['image/jpeg', 'image/png', 'image/bmp'].includes(file.type)
      // const isJPG = file.type === 'image/jpeg'
      const isLt2M = file.size / 1024 < 100
      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG PNG GIF BMP 格式!')
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 100KB!')
      }
      return isJPG && isLt2M
    },

    async uploadImg(data) {
      const file = new FormData()
      file.append('fileName', data.file)
      const res = await uploadImg(file)
      this.$emit('input', res)
    }
  }
}
</script>

<style  lang='scss'>
  .avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
  }
  .avatar {
    width: 178px;
    height: 178px;
    display: block;
  }
</style>

